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EC number: 850-366-8 | CAS number: 98969-19-8
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Hydrolysis
Administrative data
Link to relevant study record(s)
- Endpoint:
- hydrolysis
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study does not need to be conducted because the substance is readily biodegradable
- other:
- Justification for type of information:
- JUSTIFICATION FOR DATA WAIVING
In accordance with REACH Regulation (EC) No. 1907/2006 Annex VIII, column 2 section 9.2.2.1 the study does not need to be conducted if the substance is readily biodegradable. The substance rapidly degrades biotically. According to ECHA Guidance on Information Requirements and Chemical Safety Assessment (Chapter R.7a: Endpoint Specific Guidance, July 2017 and Chapter R.7b: Endpoint Specific Guidance, R.7.9, June 2017) the study does not need to be conducted. - Reason / purpose for cross-reference:
- data waiving: supporting information
- Reason / purpose for cross-reference:
- data waiving: supporting information
- Reason / purpose for cross-reference:
- data waiving: supporting information
- Endpoint:
- hydrolysis
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: non-GLP; well documented study report following a screening study and method equivalent or similar to guideline with acceptable deviations according to the regulatory conclusion that the substance is hydrolytically stable in specific pH ranges.
- Remarks:
- The study would not fulfil the requirements of OECD TG 111 (2004) Tier 2 or Tier 3 requirements. The test was conducted at physiologically relevant temperature (40 °C) rather than the guideline preliminary test temperature 50 °C.
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 111 (Hydrolysis as a Function of pH)
- Deviations:
- yes
- Remarks:
- Screening study examined: pH 2, 5, 7, 8.5 and 12 rather than guideline pH range 4, 7 and 9; duplicate tests were not performed; full analytical validation was not documented within the study; degradation products were not identified.
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method C.7 (Degradation: Abiotic Degradation: Hydrolysis as a Function of pH)
- Deviations:
- yes
- Remarks:
- see above
- Principles of method if other than guideline:
- The test followed a method equivalent or similar to OECD TG 111 (hydrolysis as a function of pH) - as a screening study for the hydrolysis properties of the test substance. The screening study examined: pH 2, 5, 7, 8.5 and 12 using suitable buffers; at 40 °C for 28d by analytical monitoring through GC-FID analyses. Regulatory conclusion that the substance is hydrolytically stable.
- GLP compliance:
- no
- Remarks:
- In accordance with REACH Regulation (EC) 1907/2006: Annex XI: section 1.1.2 adequate and reliable (with restrictions) study information has been provided (not in accordance with GLP) but which can be considered equivalent to the relevant test method.
- Radiolabelling:
- no
- Details on sampling:
- - Sampling intervals for the parent/transformation products: on a regular basis throughout the test (typically at time = 0, 0.25, 1, 2, 4, 7, 15, 21 and 28 days
- Sampling method: Small aliquots of the test solution are extracted with an organic solvent (typically cyclohexane or ethyl acetate) containing a hydrocarbon standard (typically C12, C17 or C20). The extracts are analyzed by GC-FID and the results are plotted as (Area/Area Std) expressed in [%]. The measurement at time = 0 is set at 100% and the succeeding measurements are calculated relatively to the time = 0 measurement. Therefore the curves represent the percentage of product remaining in the test solution at the time of analysis.
- Other observation, if any (e.g.: precipitation, color change etc.): None reported. - Buffers:
- - pH: test media are standard aqueous buffers at pH 2, pH 5, pH 7, pH 8.5 and pH 12 containing 1% of non ionic surfactant (Arkopal N 150).
- Type and final molarity of buffer: Molarity not reported.
• pH 2 (± 0.1) buffer : Reference Handbook of Chemistry and Physics buffer type A*
• pH 5 (± 0.1) buffer : Reference Handbook of Chemistry and Physics buffer type C*
• pH 7 (± 0.1) buffer : Reference Handbook of Chemistry and Physics buffer type D*
• pH 8.5 (± 0.1) buffer : Reference Handbook of Chemistry and Physics buffer type F*
• pH 12 (± 0.1) buffer : Reference Handbook of Chemistry and Physics buffer type I* - Details on test conditions:
- TEST MEDIUM
- Volume used/treatment: Total volume not reported
- Kind and purity of water: Deionised water (no further details reported)
- Preparation of test medium: ; 200 – 300 ppm of raw material are dissolved in the pH buffer containing the surfactant (Arkopal N 150) and put into storage in an oven at 40°C.
- Renewal of test solution: None reported.
- Identity and concentration of co-solvent: non-ionic surfactant (Arkopal N 150) was used at 1% concentration
OTHER TEST CONDITIONS
- Adjustment of pH: None reported.
- Dissolved oxygen: Not reported. - Duration:
- 28 d
- pH:
- 2
- Temp.:
- 40 °C
- Initial conc. measured:
- >= 200 - <= 300 other: parts per million
- Duration:
- 28 d
- pH:
- 4
- Temp.:
- 40 °C
- Initial conc. measured:
- >= 200 - <= 300 other: parts per million
- Duration:
- 28 d
- pH:
- 7
- Temp.:
- 40 °C
- Initial conc. measured:
- >= 200 - <= 300 other: parts per million
- Duration:
- 28 d
- pH:
- 8.5
- Temp.:
- 40 °C
- Initial conc. measured:
- >= 200 - <= 300 other: parts per million
- Duration:
- 28 d
- pH:
- 12
- Temp.:
- 40 °C
- Initial conc. measured:
- >= 200 - <= 300 other: parts per million
- Number of replicates:
- None (with occasional re-injection if required).
- Positive controls:
- no
- Negative controls:
- no
- Preliminary study:
- At pH 2, 5, 7 and 8.5, < 10% degradation after 5 days was observed. Similarly, after 28 days at pH 5, 7, 8.5 and 12, < or = 10% disappearance was observed. At pH 12, ca. 80% disappearance was observed at 2 days. Similarly, after 28 days at pH 12, ca.100% disappearance was observed. It can be concluded that under the conditions of the present test and at pH 2, 5, 7 and 8.5, the substance is hydrolytically stable (as defined in the OECD TG 111 for hydrolysis as a function of pH). At very high pH (highly basic) the substance is hydrolytically unstable with ca. 80% at 48 hours and ca. 100% degradation from day 3.
- Test performance:
- No unusual findings were reported in the study.
- Transformation products:
- not measured
- pH:
- 2
- Temp.:
- 40 °C
- Remarks on result:
- other: At pH 2, < or = 10% disappearance of the substance was observed at 5 days and 28 days
- Key result
- pH:
- 5
- Temp.:
- 40 °C
- Remarks on result:
- other: at pH 5, < 5% disappearance of the substance was observed at 5 days and 28 days
- Key result
- pH:
- 7
- Temp.:
- 40 °C
- Remarks on result:
- other: at pH 7, < 5% disappearance of the substance was observed at 5 days and 28 days
- Key result
- pH:
- 8.5
- Temp.:
- 40 °C
- Remarks on result:
- other: at pH 8.5, < 5% disappearance of the substance was observed at 5 days and , or = 10% disappearance at 28 days
- pH:
- 12
- Temp.:
- 40 °C
- Remarks on result:
- other: at pH 12, the substance is hydrolytically unstable with ca. 80% at 48 hours and ca. 100% degradation from day 3.
- Details on results:
- TEST CONDITIONS
- pH, sterility, temperature, and other experimental conditions maintained throughout the study: Yes, by use of appropriate buffers however pH was not continuously monitored throughout the study, sterility was not examined. - Validity criteria fulfilled:
- yes
- Remarks:
- The study meets the validity criteria and reliable with limitations. This is limited as detailed in 'Rationale for reliability incl. deficiencies'. Guideline Tier 2 and 3 requirements are not met.
- Conclusions:
- Under the conditions of the study, the substance is hydrolytically stable as defined in the OECD TG 111 for hydrolysis as a function of pH – tier 1: less than 10% degradation under acidic (pH 5), neutral (pH 7) and basic (pH 8.5) conditions was observed at 5 days and 40°C. Less than or equal to 10% degradation was also seen up to 28 days at 40°C. Separately, at very high pH [pH 12 (highly basic)] the substance is hydrolytically unstable with ca. 80% at 48 hours and ca. 100% degradation from day 3 at 40°C. At very low pH [[pH 2 (highly acidic)] the substance is hydrolytically stable with less than or equal to 10% degradation at 5 to 28 days and 40°C. Conclusion: At pH 5, 7, 8.5, < 10% degradation of the parent substance was observed at 5 days and 28 days and 40°C. The substance is hydrolytically stable.
- Executive summary:
The hydrolytic stability of the test item was investigated using a method similar or equivalent to OECD TG 111 (hydrolysis as a function of pH) and EU Method A.7. The test media are standard aqueous buffers at pH 2, pH 5, pH 7, pH 8.5 and pH 12 containing 1% of non-ionic surfactant (Arkopal N 150). The tests are done in accelerated conditions at 40°C for approximately one month (28d). 200 – 300 ppm of test item are dissolved in the pH buffer containing the surfactant and put into storage in an oven at 40°C. Commercial reference grades of buffer are utilised as listed in documented literature sources. Small aliquots of the test solution are extracted with an organic solvent (typically cyclohexane or ethyl acetate) containing a hydrocarbon standard (typically C12, C17 or C20) on a regular basis throughout the test (typically at time = 0, 0.25, 1, 2, 4, 7, 15, 21 and 28 days). The extracts are analysed by GC-FID. Under the analytical conditions employed the test item peak was eluted and the results were then plotted with time to show the degradation curves of the substance. For the test item < 10% degradation after 5 days was observed at pH 5, 7, 8.5 and 12. Similarly, after 28 days at pH 5, 7, 8.5 and 12, < 10% disappearance was observed. Separately, at very low pH [[pH 2 (highly acidic)] the substance is hydrolytically stable with less than or equal to 10% degradation at 5 to 28 days and 40°C. At very high pH [pH 12 (highly basic)] the substance is hydrolytically unstable with ca. 80% at 48 hours and ca. 100% degradation from day 3 at 40°C. It can be concluded that under the conditions of the present test and at pH 5, 7, 8.5, the substance is hydrolytically stable at acidic, neutral and basic pH ranges (as defined in the OECD TG 111 for hydrolysis as a function of pH).
Referenceopen allclose all
Description of key information
Hydrolysis: stable at acidic, neutral and alkali pH ranges (pH 5, 7 to 8.5) and < 10% degradation at day 5 through day 28, eq. or similar to OECD TG 111 – Tier 1, non-GLP, 2021
Note: substance is ‘readily biodegradable’, further testing is scientifically not necessary.
Supporting information: substance will rapidly (bio)degrade and mineralise within 28 days.
Key Data:
1. Biodegradation: readily biodegradable ; mean biodegradation 93 % by BOD and 100% by HPLC at 28-days. 10-day window met., OECD TG 301F, 2020a
2. Biodegradation: readily biodegradable, mean biodegradation 81.1% at 28-days, 10-day window met, OECD TG 301F, 2020b
Reference: Biodegradation - section.
Key value for chemical safety assessment
- Half-life for hydrolysis:
- 1 yr
- at the temperature of:
- 25 °C
Additional information
In accordance with REACH Regulation (EC) No. 1907/2006 Annex VIII, column 2 section 9.2.2.1 the study does not need to be conducted if the substance is readily biodegradable. The substance rapidly degrades biotically. According to ECHA Guidance on Information Requirements and Chemical Safety Assessment (Chapter R.7a: Endpoint Specific Guidance, July 2017 and Chapter R.7b: Endpoint Specific Guidance, R.7.9, June 2017) the study does not need to be conducted.
Supporting information on hydrolysis:
Eq. or similar to OECD 111 – Tier 1, non-GLP, 2021 : The hydrolytic stability of the test item was investigated using a method similar or equivalent to OECD TG 111 (hydrolysis as a function of pH) and EU Method A.7. The test media are standard aqueous buffers at pH 2, pH 5, pH 7, pH 8.5 and pH 12 containing 1% of non-ionic surfactant (Arkopal N 150). The tests are done in accelerated conditions at 40°C for approximately one month (28d). 200 – 300 ppm of test item are dissolved in the pH buffer containing the surfactant and put into storage in an oven at 40°C. Commercial reference grades of buffer are utilised as listed in documented literature sources. Small aliquots of the test solution are extracted with an organic solvent (typically cyclohexane or ethyl acetate) containing a hydrocarbon standard (typically C12, C17 or C20) on a regular basis throughout the test (typically at time = 0, 0.25, 1, 2, 4, 7, 15, 21 and 28 days). The extracts are analysed by GC-FID. Under the analytical conditions employed the test item peak was eluted and the results were then plotted with time to show the degradation curves of the substance. For the test item < 10% degradation after 5 days was observed at pH 5, 7, 8.5 and 12. Similarly, after 28 days at pH 5, 7, 8.5 and 12, < 10% disappearance was observed. Separately, at very low pH [[pH 2 (highly acidic)] the substance is hydrolytically stable with less than or equal to 10% degradation at 5 to 28 days and 40°C. At very high pH [pH 12 (highly basic)] the substance is hydrolytically unstable with ca. 80% at 48 hours and ca. 100% degradation from day 3 at 40°C. It can be concluded that under the conditions of the present test and at pH 5, 7, 8.5, the substance is hydrolytically stable at acidic, neutral and basic pH ranges (as defined in the OECD TG 111 for hydrolysis as a function of pH).
References:
1. OECD TG 111 - hydrolysis as a function of pH, (2004)
2. ECHA Guidance on Information Requirements and Chemical Safety Assessment (Chapter R.7b: Endpoint Specific Guidance, R.7.9, v4.0, June 2017)
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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